[fix] Add fraction digits props to number input widget (#7033)

Add min-fraction-digits and max-fraction-digits props to InputNumber
component to allow typing decimal values. Without these props, users
could not manually type values like "0.8" even though the increment
buttons worked correctly.

This aligns the input-only variant with the slider variant which
already had these props configured.

fix https://github.com/Comfy-Org/ComfyUI_frontend/issues/7016
## Screenshots (if applicable)



https://github.com/user-attachments/assets/fa205023-13c4-45ac-874b-b241808cf56d



┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-7033-fix-Add-fraction-digits-props-to-number-input-widget-2b96d73d36508124ac65e466802bbb0c)
by [Unito](https://www.unito.io)

---------

Co-authored-by: github-actions <github-actions@github.com>

src/renderer/extensions/vueNodes/widgets/components/WidgetInputNumberInput.vue

@@ -81,6 +81,8 @@ const buttonTooltip = computed(() => {
       size="small"
       variant="outlined"
       :step="stepValue"
+      :min-fraction-digits="precision"
+      :max-fraction-digits="precision"
       :use-grouping="useGrouping"
       :class="cn(WidgetInputBaseClass, 'grow text-xs')"
       :aria-label="widget.name"